102507091 has 4 divisors (see below), whose sum is σ = 102587184. Its totient is φ = 102427000.

The previous prime is 102507077. The next prime is 102507103. The reversal of 102507091 is 190705201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102507091 - 2²⁵ = 68952659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102507061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38095 + ... + 40696.

It is an arithmetic number, because the mean of its divisors is an integer number (25646796).

Almost surely, 2^102507091 is an apocalyptic number.

102507091 is a deficient number, since it is larger than the sum of its proper divisors (80093).

102507091 is an equidigital number, since it uses as much as digits as its factorization.

102507091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80092.

The product of its (nonzero) digits is 630, while the sum is 25.

The square root of 102507091 is about 10124.5785591303. The cubic root of 102507091 is about 468.0058729509.

The spelling of 102507091 in words is "one hundred two million, five hundred seven thousand, ninety-one".